EP0045545B1 - Device for displacing an electric switch in its cupboard - Google Patents

Device for displacing an electric switch in its cupboard Download PDF

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Publication number
EP0045545B1
EP0045545B1 EP81200825A EP81200825A EP0045545B1 EP 0045545 B1 EP0045545 B1 EP 0045545B1 EP 81200825 A EP81200825 A EP 81200825A EP 81200825 A EP81200825 A EP 81200825A EP 0045545 B1 EP0045545 B1 EP 0045545B1
Authority
EP
European Patent Office
Prior art keywords
switch
slider
door
compartment
worm
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP81200825A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0045545A3 (en
EP0045545A2 (en
Inventor
Renzo Grassi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ansaldo SpA
Ansaldo Energia SpA
Original Assignee
Ansaldo SpA
Ansaldo Componenti SRL
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ansaldo SpA, Ansaldo Componenti SRL filed Critical Ansaldo SpA
Priority to AT81200825T priority Critical patent/ATE10244T1/de
Publication of EP0045545A2 publication Critical patent/EP0045545A2/en
Publication of EP0045545A3 publication Critical patent/EP0045545A3/en
Application granted granted Critical
Publication of EP0045545B1 publication Critical patent/EP0045545B1/en
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B11/00—Switchgear having carriage withdrawable for isolation
    • H02B11/12—Switchgear having carriage withdrawable for isolation with isolation by horizontal withdrawal
    • H02B11/127—Withdrawal mechanism
    • H02B11/133—Withdrawal mechanism with interlock

Definitions

  • This invention relates to an electric switch arranged in a cupboard in which it can be displaced and from which it can even be completely withdrawn.
  • this invention relates to a device for displacing an electric switch in a compartment of a cupboard which can be closed by a door, said switch being displaceable on fixed guideways in the compartment from a "disconnected” to a “connected” position relative to the mains and vice versa, the device comprising driving means mounted in the compartment which can be shifted in order to displace the switch from the "disconnected” to the “connected” positions relative to the mains and vice versa, means for controlling the shifting of said driving means in either direction, and a first member jutting from the switch and capable of being engaged by said driving means for displacing the switch.
  • a device of this kind is known from document FR-A-1 066100.
  • the driving means for the displacement of the switch in the compartment consists of a pair of side plates fixed to a rotatable shaft which is journaled in stationary supports, profiled edges of these plates being able to engage pins jutting laterally from the switch in order to displace it in either direction on the guideways.
  • Control means for rotating said plates comprise a shaft having a wormed end engaging a nut hinged to one of said plates, said shaft being adapted to be actuated by a winch to be introduced through a first bore formed through the compartment door for engagement with the free end of the shaft.
  • a locking plate is movably mounted on one of the guideways for the switch, said locking plate being adapted to be shifted between a higher and a lower position by means of an actuation rod projecting through a second bore formed through the compartment door.
  • a slider connected to said actuation rod closes said first bore formed in the door thus preventing introduction of said winch and its engagement with the shaft controlling the rotation of the side plates for the displacement of the switch.
  • a pin kinematically connected to the movable contacts of the switch cooperates with the locking plate for preventing the same to take its higher position when the switch is "ON" and for preventing the closure of the switch when the locking plate is in its higher position.
  • the driving means consist of a carriage displaceable on a fixed guide parallel to the route of the switch displacement on said guideways and in that it further comprises:
  • said means for controlling the displacement of the driving carriage may consist of an endless screw supported for rotation in either direction in the compartment and engaged by a nut formed in the carriage.
  • Such an endless screw is aligned with the door bore and has, at a determined distance from the latter, a square cross-sectional portion for being actuated by a specially provided wrench.
  • This square cross-sectional portion can be accessed to only if the slider has previously been displaced, and such a displacement can be brought about by urging with the actuating spanner aforementioned, as introduced through the door bore.
  • a compartment 10 is provided, which can be frontally closed by a door 11 and is intended to house a switch, generally indicated by its outline 12.
  • a worm 21 is borne so as to be freely rotated in both directions.
  • the axis of said screw is parallel to the guideways 13, 14 and is aligned with a bore 22 formed through the door 11 when the latter is shut.
  • the screw 21 is prevented from being shifted axially and is extended, after having crossed the wall 19, by a smooth circular shank 23 until coming into registry with the bore 22 through the door 11.
  • the shank 23 has a portion 24 with a square cross-sectional outline which is adapted to be engaged by a tubular wrench 25 (best in Figure 4).
  • a carriage is allowed to slide, which is engaged through a central through-nut 27 by the worm 21. It is apparent that, by turning the worm in either direction, the carriage 26 is shifted along its axis.
  • the carriage 26 has at its top a transversal hollow space 28 which can be engaged by a first square-sectional pin 29 which juts downwards from the switch assembly 12.
  • this pin 29 will be dubbed a driving pin, inasmuch as it is apparent that, when it is engaged in the hollow space 28 of the carriage 26 and the carriage is caused to travel, it draws the entire switch assembly with it.
  • This driving pin 29 can take two positions, viz.: a depressed position shown in Figure 2, wherein it can engage a hollow space 28 of the carriage 26, and a lifted position, wherein it is incapable of doing so but abuts a shoulder 30 of the carriage 26.
  • the means for bringing the pin 29 to its lifted position and to hold it in certain situations is of no interest so that such means will not be described in detail or shown in the drawings.
  • the switch 12 On the same transversal plane as the pin 29, the switch 12 has a second pin 31 which likewise juts downwards and is shifted laterally. Also this pin 31, which, due to its functions, will be dubbed a latching pin, may take two positions, one of shorter projection, and the other of longer projection relative to the switch 12. Its position of longer projection, as viewed in Figure 3, can be taken by the pin either by its own weight or by the bias of a spring (not shown).
  • the internal mechanism of the switch 12 are so connected to a stop lever 32 as to take a position in which it holds the latching pin 31 in the depressed position when the contacts of the switch 12 are closed, and to take, instead, a position wherein the pin 31 can be lifted to its position of shorter projection only and exclusively when the switch contacts are open and the snap springs of the switch are unloaded. Also these internal linkages of the switch which bring about the two positions of the stopping lever 32 consistently with the closed or the open condition of the switch are not of immediate interest for the present invention, so that they are neither described in detail herein nor shown in the drawings.
  • a slider On the sidewalls 17, 18 of the guideway 16, there is slidably mounted a slider, generally indicated at 35, having the shape of a "U" with two sidewalls 36, 37 and a cross wall 38.
  • Slider 35 is supported at least by the sidewall 18 of the guideway 16 by two pins 39, 40, which are secured to the sidewall 18 and are inserted into longitudinal slots 41, 42, as formed through the corresponding sidewall 37 of the slider 35.
  • the length of these slots 41, 42 defines the stroke of possible displacement of the slider 35, which is normally held in the position shifted leftwards (as viewed in Figures 2, 3) by a spring 43 which acts between the cross wall 38 of the slider and the cross wall 19 of the fixed guideway 16.
  • the shank 23 of the worm 21 freely passes through a bore 44 formed through the cross wall 38 of the slider 35 and that in the position of rest (shifted leftwards) of the latter, the square-sectional portion 24 of the worm 21 is in the space between the cross walls 19 and 38, and thus cannot be directly accessed to on the side of the door 11.
  • a tubular wrench 25 (see Fig. 4)
  • the square portion 24 of the worm 21 it is required, at the outset, to push back the slider 35 by the same wrench 25 against the bias of the spring 43 until the squared portion 24 is unmasked and may be grasped by the tool.
  • the sidewall 37 of the slider 35 has a top horizontal plane which is at the same level as the top plane of sidewall 18 of the guideway 16.
  • the latching pin 31 of the switch cooperates with both these sidewalls of the guideway 16 and the slider 35, respectively.
  • the sidewall 37 of the slider 35 has cammed grooves 45 and 46, which are formed, each, by a lower portion and an incline which rises to the top plane of the sidewall 37 in the direction towards the cross wall 38 of the slider 35.
  • the screw can be rotated thereby and can cause the translational motion of the carriage 26 which drags with it the switch assembly 12 as a whole.
  • the tubular wrench 25 is withdrawn so that the slider 35 is permitted to take its at rest position again, under the bias of the spring 43.
  • the incline of its groove 46 permits that the latching pin 31 be gradually depressed so that it simultaneously enters the notch 34 of the fixed guideway 16.
  • the switch 12 is latched in its "connected” position and can be closed by an appropriate control.
  • the pin 31, as it lies in its position of longer projection cannot prevent the closing stroke of the switch 12 any longer.
  • both the driving pin 29 be lifted for making it clear of the hollow space 28 of the carriage 26, and that the latching pin 31 be lifted to clear it of the notch 33 of the sidewall 18 of the fixed guideway 16. Lifting these pins is an operation which can be done also manually and the pin 31 can be lifted only if the switch is open.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Power-Operated Mechanisms For Wings (AREA)
  • Push-Button Switches (AREA)
EP81200825A 1980-07-31 1981-07-20 Device for displacing an electric switch in its cupboard Expired EP0045545B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81200825T ATE10244T1 (de) 1980-07-31 1981-07-20 Vorrichtung zum verschieben eines elektrischen schalters in seinem schrank.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT23842/80A IT1132041B (it) 1980-07-31 1980-07-31 Dispositivo per la translazione di un interruttore elettrico nel suo armadio di custodia
IT2384280 1980-07-31

Publications (3)

Publication Number Publication Date
EP0045545A2 EP0045545A2 (en) 1982-02-10
EP0045545A3 EP0045545A3 (en) 1982-08-04
EP0045545B1 true EP0045545B1 (en) 1984-11-07

Family

ID=11210349

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81200825A Expired EP0045545B1 (en) 1980-07-31 1981-07-20 Device for displacing an electric switch in its cupboard

Country Status (8)

Country Link
EP (1) EP0045545B1 (it)
AR (1) AR225232A1 (it)
AT (1) ATE10244T1 (it)
BR (1) BR8104941A (it)
DE (1) DE3167069D1 (it)
IT (1) IT1132041B (it)
MX (1) MX150784A (it)
NZ (1) NZ197889A (it)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1209262B (it) * 1980-09-17 1989-07-16 Ansaldo Sa Dispositivo di sicurezza per interruttori elettrici con comando a molle traslabili in un armadio di custodia.
DE3312415C2 (de) * 1983-04-06 1985-05-02 Siemens AG, 1000 Berlin und 8000 München Antrieb zum Verschieben eines Schalterträgers in einem elektrischen Schaltfeld
FR2581805B1 (fr) * 1985-05-07 1987-06-26 Merlin Gerin Disjoncteur debrochable multipolaire equipe d'un dispositif de desarmement et de declenchement automatique lors de l'extraction
DE3672464D1 (de) * 1985-12-20 1990-08-09 Siemens Ag Elektrische schalteinrichtung mit einem einschubrahmen und einem darin einsetzbaren schaltgeraet.
ES2101378T3 (es) * 1993-04-21 1997-07-01 Sace Spa Conmutador separable.
JP4304776B2 (ja) 1999-07-27 2009-07-29 三菱電機株式会社 引出形電気機器の引出装置
DE50214969D1 (de) * 2001-02-02 2011-05-05 Eaton Ind Gmbh Auslösevorrichtung für einen ausfahrbaren Leistungsschalter
KR101052636B1 (ko) * 2009-03-11 2011-07-29 엘에스산전 주식회사 회로차단기의 대차 인입출 방지장치
GB201119824D0 (en) 2011-11-17 2011-12-28 Dow Corning Silicone resins comprising metallosiloxane
GB201119817D0 (en) 2011-11-17 2011-12-28 Dow Corning Silicone resins

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2777024A (en) * 1951-04-28 1957-01-08 Westinghouse Electric Corp Metal-enclosed switchgear
US3188414A (en) * 1962-05-14 1965-06-08 Gen Electric Releasable stop means for a movable unit in a stationary enclosure
US4004113A (en) * 1975-04-14 1977-01-18 General Electric Company Drawout apparatus for electrical switchboards

Also Published As

Publication number Publication date
MX150784A (es) 1984-07-16
IT1132041B (it) 1986-06-25
IT8023842A0 (it) 1980-07-31
DE3167069D1 (en) 1984-12-13
AR225232A1 (es) 1982-02-26
EP0045545A3 (en) 1982-08-04
EP0045545A2 (en) 1982-02-10
NZ197889A (en) 1984-07-31
ATE10244T1 (de) 1984-11-15
BR8104941A (pt) 1982-04-20

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